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canghaiwuhen
OpenXG-RAN
Commits
430b27be
Commit
430b27be
authored
Oct 28, 2019
by
Sakthivel Velumani
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Estimation at DC
parent
73e592ab
Changes
1
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1 changed file
with
12 additions
and
8 deletions
+12
-8
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+12
-8
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openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
View file @
430b27be
...
...
@@ -663,7 +663,7 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
unsigned
short
bwp_start_subcarrier
,
unsigned
short
nb_rb_pdsch
)
{
int
pilot
[
1320
]
__attribute__
((
aligned
(
16
)));
int
pilot
[
3276
]
__attribute__
((
aligned
(
16
)));
unsigned
char
aarx
;
unsigned
short
k
;
unsigned
int
pilot_cnt
;
...
...
@@ -765,12 +765,12 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
}
// Do the same for the 2 left over pilots if any (nb_rb_pdsch*12 mod 8)
if
((
nb_rb_pdsch
*
12
)
%
8
)
{
uint16_t
used_pils
=
(
nb_rb_pdsch
*
12
)
/
8
*
8
;
uint16_t
used_pils
=
(
nb_rb_pdsch
*
12
);
for
(
uint8_t
idxPil
=
0
;
idxPil
<
8
;
idxPil
+=
2
)
{
rxF
=
(
int16_t
*
)
&
rxdataF
[
aarx
][(
symbol_offset
+
nushift
+
re_offset
)];
ch
[
idxPil
]
=
(
int16_t
)(((
int32_t
)
pil
[
used_pils
+
idxPil
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
used_pils
*
idxPil
+
1
]
*
rxF
[
1
])
>>
15
);
ch
[
idxPil
+
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
used_pils
+
idxPil
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
used_pils
*
idxPil
+
1
]
*
rxF
[
0
])
>>
15
);
ch
[
idxPil
]
=
(
int16_t
)(((
int32_t
)
pil
[
used_pils
+
idxPil
]
*
rxF
[
0
]
-
(
int32_t
)
pil
[
used_pils
+
idxPil
+
1
]
*
rxF
[
1
])
>>
15
);
ch
[
idxPil
+
1
]
=
(
int16_t
)(((
int32_t
)
pil
[
used_pils
+
idxPil
]
*
rxF
[
1
]
+
(
int32_t
)
pil
[
used_pils
+
idxPil
+
1
]
*
rxF
[
0
])
>>
15
);
re_offset
=
(
re_offset
+
2
)
&
(
ue
->
frame_parms
.
ofdm_symbol_size
-
1
);
}
...
...
@@ -789,12 +789,16 @@ int nr_pdsch_channel_estimation(PHY_VARS_NR_UE *ue,
uint16_t
idxDC
=
2
*
(
ue
->
frame_parms
.
ofdm_symbol_size
-
bwp_start_subcarrier
);
// before DC
dl_ch
[
idxDC
-
2
]
=
(
dl_ch
[
idxDC
-
4
]
*
0
.
6667
)
+
(
dl_ch
[
idxDC
-
8
]
*
0
.
3333
)
;
dl_ch
[
idxDC
-
1
]
=
(
dl_ch
[
idxDC
-
3
]
*
0
.
6667
)
+
(
dl_ch
[
idxDC
-
7
]
*
0
.
3333
)
;
dl_ch
[
idxDC
-
2
]
=
(
(
dl_ch
[
idxDC
-
4
]
*
3072
)
+
(
dl_ch
[
idxDC
+
4
]
*
1024
))
>>
12
;
dl_ch
[
idxDC
-
1
]
=
(
(
dl_ch
[
idxDC
-
3
]
*
3072
)
+
(
dl_ch
[
idxDC
+
5
]
*
1024
))
>>
12
;
//after DC
dl_ch
[
idxDC
+
2
]
=
(
dl_ch
[
idxDC
+
4
]
*
0
.
6667
)
+
(
dl_ch
[
idxDC
+
8
]
*
0
.
3333
);
dl_ch
[
idxDC
+
1
]
=
(
dl_ch
[
idxDC
+
3
]
*
0
.
6667
)
+
(
dl_ch
[
idxDC
+
7
]
*
0
.
3333
);
dl_ch
[
idxDC
+
2
]
=
((
dl_ch
[
idxDC
+
4
]
*
3072
)
+
(
dl_ch
[
idxDC
-
4
]
*
1024
))
>>
12
;
dl_ch
[
idxDC
+
3
]
=
((
dl_ch
[
idxDC
+
5
]
*
3072
)
+
(
dl_ch
[
idxDC
-
3
]
*
1024
))
>>
12
;
// at DC
dl_ch
[
idxDC
]
=
(
dl_ch
[
idxDC
-
2
]
+
dl_ch
[
idxDC
+
2
])
>>
1
;
dl_ch
[
idxDC
+
1
]
=
(
dl_ch
[
idxDC
-
1
]
+
dl_ch
[
idxDC
+
3
])
>>
1
;
}
}
...
...
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